Table 2.

List of attributes and their measured values after the fine-needle inspiration process.

Attribute Name	Attribute Description	b	St. Error	Max
Radius	Mean distances from the center to the points on the perimeter	6.97–28.12	0.11–2.8	7.9–36.4
Texture	Standard deviation of grayscale values	9.72–39.27	0.36–4.8	12–49.5
Perimeter	Real value	43.79–188.5	0.7–21.9	50–251
Area	Real value	143.5–2501	6.8–542	185–424
Smoothness	Local variation (in radius lengths)	0.053–0.163	0.0–0.03	0.0–0.22
Compactness	Formula to compute: (perimeter${}^2$/area-1.0)	0.019–0.345	0.00–0.1	0.02–12
Concavity	The severity of concave portions of the contour	0.000–0.427	0.0–0.39	0.0–1.05
Concave points	Number of concave portions of the contour	0.000–0.201	0.0–0.05	0.0–0.29
Symmetry	Real value	0.106–0.304	0.0–0.07	0.15–0.6
Fractal dimension	(“coastline approximation”-1)	0.050–0.097	0.0–0.03	0.05–0.2